(1) Proposals which have been
a. submitted not on official proposal coupons;
b. submitted not on proposal coupons filled in pursuant to Section § 47 (2);
c. collected by infringing the rules of proposing shall be invalid.
(2) Any and all of the proposals of those who have proposed one and the same candidate more than once shall be invalid.
(3) Any and all of the proposals of those who have proposed more than one candidate shall be invalid.